JP2003117389A - Ozone decomposition type gas adsorbent, filter medium using this adsorbent, method for regenerating the same and regenerated article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozone decomposition type gas adsorbent and a filter medium excellent in ozone decomposing performance and gas adsorbing performance and repeatedly usable by regeneration and to provide a method for regenerating the same. SOLUTION: The ozone decomposition type gas adsorbent is obtained by impregnating one or more alkali metal compounds selected from the group comprising the salts of the alkali metals and the hydroxides of the alkali metals into the surface and/or interior of a carbon-containing porous adsorptive material. The filter medium is obtained by sticking this adsorbent to a filter base material. This ozone decomposition type gas adsorbent or filter medium is regenerated by impregnating the alkali metal compounds into the adsorbent or medium.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an ozone decomposing gas adsorbent that can be repeatedly used by regeneration, a filter material using this adsorbent, a method for regenerating the same, and a regenerated product.

[0002]

2. Description of the Related Art Ozone gas is a gas that exhibits an extremely strong oxidizing power, so it may be used for ozone deodorizers and sterilization purposes. However, it is extremely toxic if inhaled for a long time. According to the measurement method for controlling harmful substances (Labor Science Institute, Publishing (1969) P.178), respiratory effects are reported to occur from a low concentration of 1 to 2 ppm. Therefore, ozone gas has various regulations, and the allowable concentration in the working environment is set to 0.1 ppm (0.2 mg / m ³ ) as a recommended value by the Japan Society for Occupational Health. In addition, UL (Underwriters Laboratories
Inc.) standards stipulate that devices that generate ozone should not exceed 0.1 ppm in TWA (Time Weighted average) for 8 hours and 0.3 ppm in instantaneous concentration.

For this reason, measures against ozone gas are required for devices such as copying machines, printers, and air purifiers of the electrostatic precipitator that utilize the discharge phenomenon.

Conventionally, activated carbon and a manganese oxide-based catalyst have been known as decomposition and removal agents for removing ozone gas. Among them, activated carbon has the largest adsorption specific surface area among adsorbents and efficiently adsorbs a wide range of gases, but in the removal of ozone, adsorption by gas adsorption holes (van der Waals adsorption) Rather, it is considered to be due to a direct decomposition reaction between carbon on the surface of activated carbon and ozone gas. However, an evaluation of the ozone removal performance of activated carbon shows that ozone does not continue to be decomposed until the activated carbon disappears, and the ozone removal performance tends to be lost before the activated carbon disappears. There is a problem that the activated carbon whose ozone decomposing performance is once lowered cannot recover the ozone decomposing performance by being immersed in water or dried by heating at about 100 ° C.

On the other hand, the manganese oxide-based catalyst decomposes ozone by a catalytic reaction, but is gradually poisoned by impurities in the atmosphere and reaction products accompanying oxidative decomposition,
There is a problem of losing decomposition performance. Even if the deactivated manganese oxide-based catalyst is subjected to activation treatment by heating at high temperature, it is not possible to completely remove the poisoning substances, so sufficient regeneration efficiency cannot be obtained, and the catalytic reaction is not achieved. There is a problem that the accompanying generation of a by-product gas leads to the generation of an offensive odor, and further, there is a problem that it cannot cope with the removal of a wide range of gas components other than ozone because the adsorption specific surface area is significantly inferior to that of activated carbon.

By the way, in recent years, from the viewpoints of measures against global warming by reducing carbon dioxide and effective use of resources, in the field of filters as well, it is expected to develop a filter material that can be recycled, reused or reduced from the conventional disposable type. .

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and is an ozone decomposing gas adsorbent which can be repeatedly used by regeneration, and a filter material using the adsorbent. It is intended to provide a method of reproducing the same.

More specifically, the present invention aims to enhance the ozone decomposing performance of a porous adsorbent having carbon atoms such as activated carbon, and at the same time, make it easily reproducible after the performance deteriorates due to use. It is intended to provide a technology that can be effectively applied as a filter material for various copiers, printers, air purifiers of an electrostatic precipitator, a super clean room used in the semiconductor industry, etc. .

[0009]

The ozone-decomposing gas adsorbent of the present invention comprises a group of an alkali metal salt and an alkali metal hydroxide on the surface and / or inside of a porous adsorbent containing carbon atoms. One or two or more kinds of alkali metal compounds selected from the above are attached.

The filter material of the present invention is characterized in that such an ozone decomposing gas adsorbent is carried on the surface and / or inside of the filter substrate.

In order to overcome the above-mentioned problems in the prior art, the present inventor has found that an extremely large adsorption specific surface area characteristic of activated carbon and its accompanying adsorption performance of a wide range of gas components, and a reaction such as a catalytic reaction. Focusing on the fact that there is no problem of by-product gas, in order to develop a method of enhancing ozone decomposition performance while maintaining the gas adsorption performance of activated carbon and a safe and simple regeneration method, it is a cause of deterioration of ozone decomposition performance. Focusing on the possible formation of surface oxides, a method of delaying the formation of surface oxides and a method of accelerating the direct decomposition reaction, and further reactivating the activated carbon surface by removing the surface oxides generated by ozone exposure As a result of diligent research on the method of making it possible, by adsorbing an alkali metal salt or an alkali metal hydroxide on an adsorbent having carbon atoms, That the ozone decomposing performance can be improved, and that the activated carbon, which has lost its ozone decomposing performance due to ozone exposure, is subjected to an alkali cleaning treatment and then an alkali metal salt or an alkali metal hydroxide is impregnated. According to the above, it was found that the ozone decomposing performance can be efficiently regenerated, and the present invention has been completed.

That is, the present inventor conducted research on ozone decomposing / removing in various adsorbents and catalysts, and petroleum pitch-based bead-like activated carbon had an extremely low ozone decomposing performance as compared with natural coconut shell activated carbon. We focused on not having it. Petroleum pitch-based bead-like activated carbon shows a good ozone decomposing performance to some extent when pulverized in a mortar, but in the bead-like form, even a relatively small particle diameter of about 400 μm has a low level. There was a problem that it had only ozone removal performance.

The present inventor conducted an analytical evaluation using a scanning electron microscope and fluorescent X-rays in order to verify the state of the surface of activated carbon and the state of the contained elements with respect to this cause. As a result, potassium was found to be a natural coconut shell activated carbon. It was found that petroleum pitch-based activated carbon beads contained almost no such elements, whereas chlorine and chlorine were contained.

Further, the surface condition of natural coconut shell activated carbon was considerably distorted and rough, whereas the beaded activated carbon of petroleum pitch type was very smooth.

In order to verify the difference in physical adsorption performance between the two, the present inventor evaluated the adsorption performance of benzene, which is a representative of non-polar hydrocarbons, and as a result, it was found that benzene adsorption in petroleum pitch-based bead-like activated carbon was evaluated. The performance was confirmed to have an adsorption capacity of about 70 to 80% with respect to the highly activated natural coconut shell activated carbon having a BET specific surface area of 1500 m ² / g or more, which is reasonably high as a shaped activated carbon. It was found that it showed adsorption performance.

As described above, the ozone decomposition method using activated carbon
Kanism is a direct decomposition reaction of carbon and ozone on the surface of activated carbon.
And it is thought that there is a mechanism like the following formula.
Yes, but for evaluation of ozone decomposition performance under the same measurement conditions
, Natural coconut shell activated carbon and petroleum pitch based beaded activity
Significantly large differences in degradability performance between charcoal
It From this, except for the direct decomposition reaction of carbon and ozone
Because the element is in the mechanism of ozonolysis,
Based on the prediction that
It does not contain potassium and chlorine, which are rarely present in the activated carbon itself.
I tried to impregnate the compound. C_xO_y(solid) ＋ O_Three  → C_xO_{y + 1}(solid) ＋ O_Two C_xO_y(solid) ＋ O_Three  → C_x-1O_{y + 1}(solid) + CO
_Two

Then, the inventor of the present invention
1, KCl, LiOH, NaOH, KOH, Li ₂ CO
₃ , the alkali metal salt such as Na ₂ CO ₃ , K ₂ CO ₃ or hydroxide alone does not have ozone decomposing performance, and also, for inorganic porous adsorbents such as zeolite, Since the ozone decomposing performance cannot be exhibited even when these alkali metal compounds are impregnated, it was found that the presence of carbon atoms is very important as the porous adsorbent substance to which these alkali metal compounds are impregnated.

The ozone-decomposing gas adsorbent and filter material of the present invention exhibit remarkably excellent ozone-decomposing performance due to the impregnation of the alkali metal compound, and the gas-adsorbing property inherent to the porous adsorbing substance makes it possible to adsorb other components. It is also suitable for removal.

The ozone-decomposing gas adsorbent and the filter material of the present invention as described above are used after the ozone-decomposing performance or the gas-adsorbing performance is lowered by exposure to ozone gas or odor. According to the method of regenerating the filter material, it can be easily regenerated by impregnating the alkali metal compound, or by washing with an alkaline cleaning liquid and then impregnating the alkali metal compound.

The regenerated product of the ozone decomposing type gas adsorbent and the regenerated product of the filter material of the present invention are those regenerated by such a regenerating method of the present invention.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below.

In the ozone-decomposing gas adsorbent of the present invention, as the carbon-containing porous adsorbent, petroleum pitch-based activated carbon, coconut palm activated carbon, activated carbon fiber, coal-based activated carbon, wood-based activated carbon, old tire regeneration activated carbon, As long as it is a carbon atom-containing porous adsorbent such as bone charcoal, it is not particularly limited, but in terms of contact efficiency with ozone and adsorption efficiency with adsorbent, palm pattern activated carbon or activated carbon having a high adsorption specific surface area. Fiber and petroleum pitch-based activated carbon are preferred.

Regarding the shape of the porous adsorbent substance,
Crushed, powder, pellet, spherical, elliptical, fibrous, etc. are not particularly limited, but reduction of pressure loss during filter processing and securing of adsorbent adhesion and ozone and other gas components From the viewpoint of enhancing the contact efficiency and the adsorption efficiency, the spherical or crushed one can be preferably used.

The adsorption specific surface area of the porous adsorbent is not particularly limited, but it is 50 by the BET method.
0 m ² / g or more, in particular 1000 m ² / g or more, particularly, in view of such adsorption efficiency and handling properties of the contact efficiency and adsorbate with ozone, selected to have an adsorption specific surface area of 1000 to 2000 ² / g Good to do. Further, the average particle diameter of the adsorbent is preferably 5 to 5000 μm from the viewpoint of the contact efficiency with ozone, the adsorption efficiency with the adsorbent and the handling property. In addition, when the porous adsorbing substance has an irregular shape such as a fibrous shape, the average particle diameter indicates the length of the long side such as the fiber length.

Further, from the viewpoint of repeated use by reproduction,
As a property required for the porous adsorbent, a porous adsorbent having a hardness as high as possible is preferable, and JIS K1474-using 80% by weight or more, preferably 90% by weight or more.
Those having a hardness of 4.7 are less likely to be damaged by regeneration, which is preferable. The JIS K1474-4.7 hardness is the hardness measured by the steel ball shaking method.

The method for producing such a porous adsorbing material containing carbon atoms is not particularly limited, either, but from the viewpoint of delaying or suppressing the formation of oxides on the surface of the adsorbent upon exposure to ozone, the no-binder production method. Those made of are preferred.

In the ozone-decomposing gas adsorbent of the present invention, the porous adsorbent may be a combination of two or more kinds of materials having different materials, shapes, manufacturing methods and other characteristics.

The alkali metal salt and the alkali metal hydroxide to be attached to such a porous adsorbing material containing carbon atoms are not particularly limited, but the solubility in water at the time of applying the attachment is not limited. From the viewpoint, as the alkali metal salt, carbonate or hydrochloride is preferable, and more specifically, LiCl, NaCl, KCl, LiOH, NaO.
H, KOH, Li ₂ CO ₃ , Na ₂ CO ₃ , K ₂ CO ₃
Can be preferably used. These alkali metal compounds,
There is no particular limitation as to whether one kind is impregnated alone or two kinds or more are impregnated, but the kind and concentration of the gas component to be treated, the use conditions, and the porous adsorbent to be impregnated It can be appropriately selected depending on the type and the like, including the blending ratio.

The method of impregnating such an alkali metal compound on the porous adsorbent is not particularly limited, but an aqueous solution of the alkali metal compound is prepared in advance, and the aqueous solution of the alkali metal compound (hereinafter referred to as "alkali metal compound") is prepared. It may be referred to as "compound impregnated aqueous solution".) A method of immersing the porous adsorbent in the above, or a method of spraying an aqueous solution of an alkali metal compound onto the porous adsorbent, and the impregnation method is the porous adsorbent. Can be appropriately selected depending on the type of the adsorbent, the use conditions of the adsorbent obtained, the processing conditions and the like. When the porous adsorbent is impregnated in the alkali metal compound impregnated aqueous solution to impregnate the alkali metal compound, the porous adsorbent may be immersed in the static state, or may be immersed in a state where ultrasonic vibration is applied to the aqueous solution. Good, especially by applying ultrasonic vibration, the attachment efficiency can be improved.

The concentration of the alkali metal compound in the alkali metal compound-impregnated aqueous solution is appropriately set depending on the type of the porous adsorbent and the use conditions of the adsorbent, and is not particularly limited, but is 0.1 to 10 mol / L. , Especially 0.5 ~
It is preferably 3.0 mol / L. This concentration is 0.
When the amount is less than 1 mol / L, the physical adsorption performance is less affected by the impregnation, but the sufficient amount of the impregnation cannot be obtained, so that the effect of improving the ozone decomposition performance due to the impregnation cannot be sufficiently obtained. Further, at a concentration of more than 10 mol / L, the adsorption surface area of the porous adsorbent is lost, which impairs the physical adsorption performance, and also interferes with the contact state between ozone and carbon, resulting in ozone decomposition. Performance may decrease.

The alkali metal compound-impregnated aqueous solution is used to prevent the alkali metal compound from scattering after drying.
It may contain one or more binder components selected from the group consisting of latex, hot melt powder, and water-dispersion type emulsion. In this case, the content of such binder component in the aqueous solution is 1 to 1. 30% by weight
Is preferred.

The alkali metal compound-impregnated aqueous solution is a chemical agent capable of imparting gas adsorption performance and regeneration performance to aldehydes and basic gases without impairing ozone decomposition performance of the obtained adsorbent. It may contain one or more selected from the group consisting of certain aminophenylacetic acid, 2-aminoethane-1-sulfonic acid and malic acid. In this case, the content of such a drug in the aqueous solution is It is preferably 0.1 to 30% by weight.

Further, this alkali metal compound-impregnated aqueous solution contains aluminum hydroxide, ammonium bromide, antimony trioxide, in order to impart flame retardancy to the obtained adsorbent.
Inorganic flame retardants such as antimony pentoxide, dibasic ammonium phosphate, ammonium sulfate, and boric acid may be contained, and in this case, the content of such inorganic flame retardant in the aqueous solution is 1 to 30% by weight. Preferably there is.

In the ozone-decomposing gas adsorbent of the present invention, the alkali metal compound is preferably impregnated in the porous adsorbent in an amount of 0.1 to 30% by weight,
The amount of impregnation can be adjusted by appropriately selecting the concentration of the alkali metal compound in the aqueous solution of impregnated alkali metal compound and the method of impregnation. If the amount of impregnation is less than 0.1% by weight, the effect of improving the ozone decomposition performance due to the impregnation is not sufficient, and if it exceeds 30% by weight, the adsorption surface area of the porous adsorbent is lost and the physical adsorption performance is reduced. And the contact state between ozone and carbon is hindered, which may deteriorate the ozone decomposing performance.

The filter material of the present invention has such an ozone decomposing gas adsorbent of the present invention adhered to a filter substrate.

Examples of the filter substrate include foam such as polyurethane foam, polyolefin foam, ceramic foam and metal foam, processed products of the foam, organic fibers such as polyamide, polyethylene, polypropylene, polyester and polytetrafluoroethylene,
Examples include one or two or more selected from the group consisting of glass fiber, ceramic fiber, and paper.
It is not limited to these.

The structure of the filter base material has a three-dimensional net-like skeleton structure, a net shape, a pleat shape formed into a pleated shape, and a corrugated sheet is laminated to cut the cross section. , A honeycomb structure, a net-like one having a three-dimensional structure in which fibers are knitted in a three-dimensional shape, a net-like shape in which a plurality of fibers are bundled and twisted and woven in a plane geometry, both vertical and horizontal axes Examples include a single structure or two or more composite structures selected from the group consisting of stretched net-like ones and non-woven fabric-like ones made by a melt blown or spunbonding method. It is not limited to these.

The method for adhering the ozone-decomposable gas adsorbent of the present invention to such a filter substrate can be appropriately selected depending on the purpose and application, and is not particularly limited. A dry deposition method can be used.

The wet impregnation method is a method in which a filter substrate is dipped in a slurry in which an adsorbent and a binder component are kneaded, impregnated and then dried, while the dry adhesion method is performed in advance on the surface of the filter substrate and And / or a binder component is applied to the inside of the filter component to make it adhere, and then the adsorbent is made to adhere to the filter substrate by utilizing the adhesive force and tackiness (tack force) of the binder.

Among these adhesion methods, the wet impregnation method is
Although there is an advantage that the filter is relatively easy to manufacture, the binder component covers the entire surface of the adsorbent, so that the binder component may be a factor that inhibits the catalytic decomposition reaction of ozone and carbon, or the gas component. There is a drawback that it becomes a factor that inhibits the adsorption of On the contrary,
Compared with the wet impregnation method, the dry deposition method has a drawback that the manufacturing process is complicated, but since the entire surface of the adsorbent is not covered by the binder component, the catalytic decomposition reaction between ozone and carbon and the gas component It is preferable because it does not hinder the adsorption and the adsorbent adhesion amount per unit area is higher than that of the wet method pair.

The binder for adhering the adsorbent to the filter substrate is not particularly limited because it depends on whether or not it is recycled, but for example, moisture-reactive urethane prepolymer, synthetic rubber adhesive, modified silicone. -Based prepolymers and hot melt types thereof, two-component curing type urethane emulsions with isocyanate, epoxy binders, vinyl acetate binders, acrylic binders, polyolefin binders, SBR binders, NBR binders, chloroprene binders, etc. One or two or more of these can be selected, but it is preferable to use a non-solvent binder from the viewpoint of the effect on the ozone decomposition performance of the adsorbent, the gas adsorption performance, and the consideration for the environment. Exposure to ozone and repeated cleaning and impregnation with alkaline aqueous solution From a physical point of view, moisture-reactive urethane prepolymers with excellent chemical resistance, heat resistance, and water resistance, synthetic rubber adhesives containing moisture-reactive urethane prepolymers, and moisture-reactive modified silicone prepolymers A hot melt type is preferred.

In producing the filter material of the present invention, the ozone decomposing gas adsorbent of the present invention in which an alkali metal compound is previously attached to a porous adsorbent may be attached to the filter base material, or the filter substrate After the porous adsorbing substance is attached to the material, the alkali metal compound may be attached. Therefore, the filter material of the present invention can be manufactured, for example, by the following method.

I In case of wet impregnation method A filter substrate is impregnated with a slurry containing the adsorbent of the present invention and a binder component, and then dried. A filter base material is impregnated with a slurry containing the porous adsorbent according to the present invention, an alkali metal compound, and a binder component, and then dried. A filter substrate is impregnated with a slurry containing a porous adsorbing substance and a binder component according to the present invention to adhere the porous adsorbing substance, and then impregnated with the alkali metal compound impregnating aqueous solution to impregnate the alkali metal compound. .

II In the case of the dry deposition method After coating or spraying the binder component on the filter substrate or impregnating the filter substrate with a liquid containing the binder component to form a binder layer on the filter substrate,
The ozone decomposing gas adsorbent of the present invention is attached. After coating or spraying the binder component on the filter substrate, or by impregnating the filter substrate with a liquid containing the binder component to form a binder layer on the filter substrate,
The porous adsorbing material according to the present invention is attached, and then the above-mentioned alkali metal compound impregnating aqueous solution is impregnated to impregnate the alkali metal compound.

In the filter material of the present invention, the amount of the binder component and the ozone decomposing gas adsorbent adhering to the filter base material varies depending on the material and structure of the filter base material, the purpose of use of the filter material, etc. To ozone decomposing type gas adsorbent in a weight ratio of 50 to 5
The amount is preferably 000% by weight, and in order to obtain such adsorbent adhesion amount, the binder component for adsorbing the adsorbent is preferably 10 to 300% by weight with respect to the filter material.

The slurry containing the binder component used in the wet impregnation method or the alkali metal compound-impregnated aqueous solution used in the dry deposition method is the above-mentioned aminophenylacetic acid, 2-
It goes without saying that a drug such as aminoethane-1-sulfonic acid or malic acid or an inorganic flame retardant may be contained, and an inorganic flame retardant may be further attached to the filter material obtained by the above method.

The method for regenerating the ozone-decomposing gas adsorbent or filter material of the present invention comprises using such an ozone-decomposing gas adsorbent or filter material of the present invention for ozone decomposition treatment or gas adsorption treatment. This is a method of regenerating a material with reduced ozone decomposition performance or gas adsorption performance, in which the surface oxide generated on the adsorbent or filter material by ozone decomposition after washing the used adsorbent or filter material with an alkaline aqueous solution is preferable. After the removal, the alkali metal compound is impregnated according to the method of impregnating the alkali metal compound in producing the ozone decomposing gas adsorbent of the present invention.

The type of the alkaline substance and the concentration of the aqueous solution thereof in the cleaning solution used for the alkaline cleaning vary depending on the ozone exposure atmosphere of the adsorbent or the filter material to be treated and the state of deterioration, and are not particularly limited, but they are dissolved in water. From the viewpoint of properties, alkaline substances such as LiCl, NaCl, KC
1, LiOH, NaOH, KOH, Li ₂ CO ₃ , Na
₂ CO ₃ and K ₂ CO ₃ can be preferably used, and among them, since NaOH and KOH having a strong alkalinity show a good cleaning effect even in a small amount, they are preferable. The cleaning liquid may contain one kind of alkaline substance or two or more kinds thereof. The concentration of these alkaline substances in the cleaning liquid is preferably adjusted to be lower than the concentration of the above-mentioned aqueous solution of an alkali metal compound-impregnated solution.
01-1.0 mol / L, especially 0.01-0.1 mol
It is preferable to adjust to / L.

From the viewpoint of cleaning effect, it is preferable to carry out the alkali cleaning by immersion cleaning of the adsorbent or the filter material in a state where ultrasonic vibration is applied to the alkaline aqueous solution.

[0050]

EXAMPLES The present invention will be described more specifically with reference to Examples and Comparative Examples below.

In the following, in order to determine the impregnation effect of a porous adsorbing substance having carbon atoms by an alkali metal compound, petroleum pitch which has a low ozone decomposing ability in activated carbon and hardly contains impurities such as potassium and sodium. We selected bead-type activated carbon as a support for impregnating a porous adsorbent, and investigated the effect on the ozone decomposition performance by impregnating an alkali metal compound on the basis of this adsorbent.

Example 1 Petroleum pitch-based beaded activated carbon (trade name BAC-SP type, adsorption specific surface area 1100 m ² / g, manufactured by Kureha Chemical Industry Co., Ltd., having an average particle size of 400 μm in 100 mL of a 1 mol / L potassium chloride aqueous solution. , JIS K1474-4.7
A hardness of 97% by weight and an average particle diameter of 400 μm) (10 g) were added, and the mixture was allowed to stand still for 30 minutes, dehydrated using a vacuum suction filter, and dried in an oven at 110 ° C. for 15 minutes to impregnate potassium chloride. An activated carbon sample was obtained, the ozone decomposition performance was measured, and the results are shown in Table 1.

FIG. 1 is a system diagram showing a schematic configuration of an apparatus used for measuring the ozone decomposition performance.

Reference numeral 1 denotes an ozone generator. In this ozone generator, dry air is supplied to a discharge tube, ozone is generated by a silent discharge method, diluted with diluted air that has passed through a NO _X removal tank, and fed. did. The ozone gas concentration was adjusted by adjusting the applied voltage of the discharge tube, and the flow rate was adjusted with the flow meter 1A so that a flow rate of 1 m / sec could be obtained in the test column (inner diameter 30 mmφ) with diluted air.

A potassium chloride-impregnated activated carbon sample 2 was added to 0.2%.
7 g of the sample was weighed and filled in an acrylic sample container with an inner diameter of 30 mmφ covered with polypropylene fiber non-woven fabric having a basis weight of 60 g / m ² and then a gas flow diameter of 30 mmφ × 60
The center of the 0 mm long acrylic column 4 (3 from the back side)
00 mm), 18 ppm of ozone gas was aerated under the condition of a flow rate of 1 m / sec, the ozone concentration at the inlet and the outlet of the column 4 was measured, and the ozone removal rate after 1 hour of aeration was determined.

Measurement of ozone concentration at the inlet and outlet of column 4
Is based on Beer's law by the ozone concentration measuring instrument 5.
253.7 nm wavelength using the low-pressure mercury lamp 6 as a light source
Photocurrent detection of the amount of ultraviolet absorption (photocurrent) by ozone in the region
It carried out by measuring with the output device 8. The ozone concentration
In order to measure the
The flow rate of ozone gas sent to is 3 L / min,
An ozone gas flow upstream of the sample container 3 of the column 4,
The downstream ozone gas flow is connected to the timer and solenoid valve V ₁, V_Two
By switching alternately with the operation of
The mouth ozone concentration and the outlet ozone concentration were measured.

The ozone removal rate was calculated by inputting the measurement result of the ozone concentration measuring device 5 into the CPU 9 and substituting the inlet gas concentration and the outlet gas concentration into the following equation. In addition,
The measurement result was calculated after correcting the light amount fluctuation.

[0058]

[Equation 1]

The amount of potassium chloride added to the activated carbon of the obtained sample is as shown in Table 2.

Example 2 A petroleum pitch-based beaded activated carbon (trade name BAC-SP type) manufactured by Kureha Chemical Industry Co., Ltd. having an average particle size of 400 μm was added to 100 mL of a 1 mol / L sodium chloride aqueous solution.
After adding 0 g and immersing still for 30 minutes, it was dehydrated using a vacuum suction filter and further dried in an oven at 110 ° C. for 15 minutes to obtain a sodium chloride-impregnated activated carbon sample.

With respect to the obtained sample, the ozone decomposing performance after 1 hour of aging was examined in the same manner as in Example 1, and the results are shown in Table 1. Table 1 also shows the amount of sodium chloride impregnated on the activated carbon of the obtained sample.

Example 3 1 mL of petroleum pitch-based beaded activated carbon (trade name BAC-SP type) manufactured by Kureha Chemical Industry Co., Ltd. having an average particle diameter of 400 μm was added to 100 mL of a 1 mol / L potassium hydroxide aqueous solution.
After adding 0 g and soaking still for 30 minutes, dehydration was performed using a vacuum suction filter and further drying was performed in an oven at 110 ° C. for 15 minutes to obtain a potassium hydroxide-impregnated activated carbon sample.

With respect to the obtained sample, the ozone decomposing performance after 1 hour was examined in the same manner as in Example 1, and the results are shown in Table 1. Table 1 also shows the amount of potassium hydroxide impregnated on the activated carbon of the obtained sample.

Example 4 10 g of petroleum pitch-based beaded activated carbon (trade name BAC-SP type) manufactured by Kureha Chemical Industry Co., Ltd. having an average particle diameter of 400 μm was added to 100 mL of a 1 mol / L sodium hydroxide aqueous solution, and 30 After being left to stand for a minute, it was dehydrated using a vacuum suction filter and dried in an oven at 110 ° C. for 15 minutes to obtain a sodium hydroxide-impregnated activated carbon sample.

With respect to the obtained sample, the ozone decomposing performance after 1 hour was examined in the same manner as in Example 1, and the results are shown in Table 1. Table 1 also shows the amount of sodium hydroxide impregnated on the activated carbon of the obtained sample.

Example 5 In 100 mL of a 1 mol / L potassium carbonate aqueous solution, 10 petroleum pitch-based beaded activated carbons (trade name BAC-SP type) manufactured by Kureha Chemical Industry Co., Ltd. having an average particle size of 400 μm were used.
After being charged with g and immersed for 30 minutes in a stationary state, it was dehydrated using a vacuum suction filter, and further dried in an oven at 110 ° C. for 15 minutes to obtain a potassium carbonate-impregnated activated carbon sample.

With respect to the obtained sample, the ozone decomposing performance after 1 hour was examined in the same manner as in Example 1, and the results are shown in Table 1. Table 1 also shows the amount of potassium carbonate impregnated on the activated carbon of the obtained sample.

Example 6 1 ml of petroleum pitch-based bead-like activated carbon (trade name BAC-SP type) manufactured by Kureha Chemical Industry Co., Ltd. having an average particle diameter of 400 μm was added to 100 mL of a 1 mol / L sodium carbonate aqueous solution.
0 g was added, and the mixture was allowed to stand still for 30 minutes, dehydrated using a vacuum suction filter, and further dried in an oven at 110 ° C. for 15 minutes to obtain a sodium carbonate-impregnated activated carbon sample.

With respect to the obtained sample, the ozone decomposing performance after 1 hour was examined in the same manner as in Example 1, and the results are shown in Table 1. Table 1 also shows the amount of sodium carbonate impregnated on the activated carbon of the obtained sample.

Comparative Example 1 In order to understand the relationship between a porous adsorbing material having no carbon atom and an alkali metal compound, synthetic zeolite was used as an adsorbent-carrying carrier for an adsorbent, and impregnation was carried out in the same manner as in Example 1. I went.

That is, 10 g of synthetic zeolite (trade name A-5) manufactured by Tosoh Corporation was put into 100 mL of a 1 mol / L potassium chloride aqueous solution, and the mixture was allowed to stand still for 30 minutes and then a vacuum suction filter was used. And dehydrated, and further dried in an oven at 110 ° C. for 15 minutes to obtain a potassium chloride-impregnated zeolite.

With respect to the obtained sample, the ozone decomposing performance after 1 hour was examined in the same manner as in Example 1, and the results are shown in Table 1. Table 1 also shows the amount of potassium chloride added to the zeolite of the obtained sample.

Comparative Example 2 Petroleum pitch-based beaded activated carbon (trade name BAC) manufactured by Kureha Chemical Industry Co., Ltd., which was used as the impregnated carrier in Examples 1 to 6
(SP type) 0.7 g of this sample as it is in order to investigate the potential ozone decomposition performance in the untreated unimpregnated state
Weighing was performed, and the ozone decomposing performance after 1 hour was examined in the same manner as in Example 1. The results are shown in Table 1.

[0074]

[Table 1]

Example 7 In order to examine the effect of repeated regeneration by exposure to ozone, a potassium chloride-impregnated activated carbon sample, which had the highest ozone decomposition performance among the samples of Examples 1 to 6, was used to perform a regeneration experiment by re-impregnation.

First, in 100 mL of a 3 mol / L potassium chloride aqueous solution, petroleum pitch bead-like activated carbon (trade name BAC) having an average particle diameter of 400 μm manufactured by Kureha Chemical Industry Co., Ltd.
-SP type) was added thereto, and the mixture was allowed to stand still for 30 minutes, dehydrated using a vacuum suction filter, and further dried in an oven at 110 ° C for 15 minutes to obtain a potassium chloride-impregnated activated carbon sample.

0.7 g of the obtained sample was weighed, and the ozone decomposing performance was evaluated in the same manner as in Example 1 to examine the initial ozone removal rate 5 minutes after the start of ozone aeration, and the results are shown in Table 2. It was shown to.

After that, 18 ppm of ozone gas was aerated until the sample completely passed through (until the ozone concentration at the inlet and the ozone concentration at the outlet became the same), and the aeration time until the breakthrough was 55 hours. there were.

Example 8 The sample after breakthrough in the ozone aeration test of Example 7 was taken out, and the whole amount of the sample was put into a 0.1N potassium hydroxide aqueous solution and immersed until the potassium hydroxide aqueous solution became completely transparent. After washing by repeating drainage,
The sample was re-attached by immersing it in a 1 mol / L potassium chloride aqueous solution for 30 minutes, dehydrated by a vacuum suction filter, and then dried in an oven at 110 ° C. for 15 minutes to obtain a regenerated sample.

About the obtained regenerated sample, Example 7
The initial ozone removal rate was examined 5 minutes after the start of ozone ventilation, and the results are shown in Table 2.

Also, for this regenerated sample, as in Example 7, it was 18 ppm until the sample completely broke through.
The ozone gas was aerated, and the aeration time until breakthrough was examined, and the results are shown in Table 2.

Further, the ratio (percentage) of the initial ozone removal rate 5 minutes after the start of aeration of the present regenerated sample to the initial ozone removal rate 5 minutes after the start of aeration in Example 7 was obtained, and this was taken as the regeneration efficiency, and the result was obtained. Is shown in Table 2.

Comparative Example 3 The regeneration efficiency was confirmed only by immersion in water using the sample obtained in Example 8 which had been broken through by exposure to ozone. According to the experiment of Example 8, 100 mL of ion-exchanged water was charged with the whole amount of the completely ruptured sample, and after immersion for 1 hour, while washing with running ion-exchanged water, taking care so that the entire amount of the sample could be recovered, After filtering this sample with a vacuum suction filter, use an oven at 110 ° C for 15
A regenerated sample was obtained by drying for a minute.

About the obtained regenerated sample, Example 7
The initial ozone removal rate was examined 5 minutes after the start of ozone ventilation, and the results are shown in Table 2.

Also, with respect to this regenerated sample, as in Example 7, until the sample completely breaks through, 18 pp
The ozone gas of m was aerated and the aeration time until the breakthrough was examined, and the results are shown in Table 2.

Further, the ratio (percentage) of the initial ozone removal rate after 5 minutes from the start of aeration of this regenerated sample to the initial ozone removal rate after 5 minutes from the start of aeration in Example 7 was determined, and this was taken as the regeneration efficiency. Is shown in Table 2.

Example 9 Using the sample of Comparative Example 3 which had been broken through by exposure to ozone, an experiment was conducted on the regeneration effect of ultrasonic cleaning.
First, an ultrasonic cleaner was filled with a 0.1 N aqueous solution of potassium hydroxide, and the entire amount of the sample completely breached by the experiment of Comparative Example 3 was put into the ultrasonic cleaning machine. Sonicated. Next, completely remove the 0.1N potassium hydroxide aqueous solution used for washing,
The main-cleaned sample was put into an ultrasonic cleaning machine filled with a 1 mol / L potassium chloride aqueous solution, immersed for 5 minutes in ultrasonic waves, and then dehydrated using a vacuum suction filter. Then, a regenerated sample was obtained by drying in an oven at 110 ° C. for 15 minutes.

About the obtained regenerated sample, Example 7
The initial ozone removal rate was examined 5 minutes after the start of ozone ventilation, and the results are shown in Table 2.

Also, with respect to this regenerated sample, as in Example 7, until the sample completely breaks through, 18 pp
The ozone gas of m was aerated and the aeration time until the breakthrough was examined, and the results are shown in Table 2.

Further, the ratio (percentage) of the initial ozone removal rate 5 minutes after the start of aeration of the present regenerated sample to the initial ozone removal rate 5 minutes after the start of aeration in Example 7 was determined, and this was taken as the regeneration efficiency. Is shown in Table 2.

[0091]

[Table 2]

Example 10 As a filter substrate, a film-removed product of polyether urethane foam manufactured by Bridgestone Corporation (trade name: Everlite SF QW-12 7t) was used, and this was 7 mm × 25
It is cut into 0 mm x 250 mm, and the reactive urethane hot melt manufactured by Nippon NSC Ltd.
Bond Master MR70) was applied so that the coating amount would be 45 g / L.

Thereafter, the ozone decomposing type gas adsorbent produced in Example 1 was fed from the front and back surfaces so that it could be uniformly adhered to the inside of the filter substrate. Next, the excess ozonolysis-type gas adsorbent is shaken off, 150 g /
The ozone-decomposing gas adsorbent-attached filter of Example 10 to which the L ozone-decomposing gas adsorbent was attached was obtained.

The obtained sample was evaluated as follows, and the results are shown in Table 3.

Ozone removal rate after 5 minutes of elapsed time This filter was punched into 38 mmφ using a Thomson blade, and then placed on an acrylic sample mounting holder with an inner diameter of 30 mmφ so that the gas contact diameter of ozone gas and the filter was 30 mmφ. Attach the filter sample,
Using the same ozone decomposition performance tester as that used in Example 1, the ozone removal performance after the initial 5 minutes was measured under the conditions of an ozone concentration of 18 ppm and a flow rate of 1 m / sec.

For the filter sample of Example 10, ozone gas was continuously aerated for 24 hours until the ozone removal rate of the filter became zero in order to confirm the effect of the regeneration treatment of Example 11 below.

Desorption level of attached drug This sample was cut into 100 mm × 100 mm, and 500
The powder was dropped from a height of mm onto a black paper sheet and the powder falling level of the adhesive was visually confirmed.

Acetaldehyde removal rate after 60 minutes of aging In order to confirm the acetaldehyde deodorizing performance effect, this sample was punched out to a diameter of 40 mm and an inner diameter of 40 mm as shown in FIG.
A sample 12 is set in the center of an acrylic column 11 having a diameter of mmφ and a length of 300 mm, and 1 L is obtained by a bubbling aeration method using an air pump 14 using a gas cleaning bottle 13.
The rate of removal of 50 ppm of acetaldehyde after 60 minutes with passage of time was determined by performing one-pass aeration at / min. The gas concentration of acetaldehyde was adjusted by diluting a 95% acetaldehyde reagent to 2/100 with water, and further diluting it to 5/1000 using it as a stock solution, and weighing 200 cc of this acetaldehyde solution 15 in a gas cleaning bottle 13. The initial gas concentration during measurement was set to 50 ppm. For gas detection, gas detector tube No. manufactured by Gastec Co., Ltd. 9
Using 2M, the inlet gas concentration was detected at the inlet side three-way cock 16 portion, and the outlet gas concentration was detected at the outlet side three-way cock 17.

UL-94 Combustion Test This sample was cut into 50.8 mm × 152.4 mm,
UL-94 combustion test was conducted.

Example 11 The ozone deterioration filter of Example 10 was replaced with K of 0.01N.
It was dipped in an aqueous OH solution, and when stains in the aqueous solution became conspicuous, the solution was replaced, and washing was repeated until the aqueous solution became transparent.

The sample washed in the above process was taken out of the KOH aqueous solution, and then 1 mol / L of KCl was added.
After being soaked in the aqueous solution for 30 minutes, it was dehydrated and dried at 110 ° C. for 5 minutes to obtain a regenerated filter.

In order to grasp the initial performance recovery rate of the filter after this regeneration treatment, ozone concentration was 18 ppm and flow rate was 1
The ozone decomposing performance was evaluated after the initial 5 minutes under the same conditions as in Example 10 at m / sec, and the results are shown in Table 3.

Further, the ratio (percentage) of the initial ozone removal rate 5 minutes after the start of aeration of the present regenerated sample to the initial ozone removal rate 5 minutes after the start of aeration in Example 10 was obtained, and this was taken as the regeneration efficiency, and the result was obtained. Is shown in Table 3.

Example 12 In 2000 g of a 1 mol / L concentration KCl aqueous solution, 60 g of an acrylic emulsion (trade name: AE932) manufactured by E-Tech Co., Ltd. was added as a binder component, and after stirring well, 200 g of Kureha Chemical Industry Co., Ltd. Petroleum pitch-based beaded activated carbon (trade name BAC-SP type) of
KCl was adhered by immersing for 30 minutes with stirring. Then, the binder dispersion liquid was dehydrated using a vacuum suction filter and dried at 110 ° C. so as to be completely dried.

In order to fix the ozone-decomposing gas adsorbent obtained by these treatments to a filter substrate to form a filter, a film-removed product of a polyether-based urethane foam manufactured by Bridgestone Corporation (trade name) as a filter substrate. Everlight SF QW-12 7t) was cut into 7 mm x 250 mm x 250 mm, and then 45 g / mL using a reactive urethane hot melt (trade name: Bondmaster MR70) manufactured by Nippon NSC Co., Ltd.
It was applied so as to have L.

Thereafter, KCl mixed with the above-mentioned binder component is used.
The impregnated activated carbon was fed from the front surface and the back surface so that it could be evenly adhered to the inside of the filter substrate, and then excess activated carbon was shaken off to obtain a filter to which 153 g / L of an ozone decomposing gas adsorbent was adhered. .

The filter sample obtained was used in Example 10.
The ozone decomposing performance was evaluated 5 minutes after the initial stage by the same method as described above, and the desorption level of the impregnated chemical was examined. The results are shown in Table 3.

EXAMPLE 13 p-Aminophenylacetic acid 0.2 in 2 L of ion exchange water.
%, KCl 9.5%, KOH 0.07% were dissolved, and 200 g of petroleum pitch-based beaded activated carbon (trade name BAC-SP type) manufactured by Kureha Chemical Industry Co., Ltd. was added to this mixed solution while stirring, Immersion was applied. Then, this mixed aqueous solution was dehydrated using a vacuum suction filter and dried at 110 ° C. so as to be completely dried to obtain a mixed impregnated activated carbon of p-aminophenylacetic acid and KCl.

In order to fix this impregnated activated carbon to a filter base material to form a filter, a filter base material 7
A film-removed product of Polyether-based urethane foam manufactured by Bridgestone Co., Ltd. (trade name Everlite SFQW-12 7t) cut into mm × 250 mm × 250 mm was used as a binder, and the reactivity of Nippon NSC Co., Ltd. was used as a binder. Using urethane hot melt (trade name: Bondmaster MR70), it is coated at 45 g / L, and then the above-mentioned impregnated activated carbon is uniformly applied by feed processing from the front and back surfaces of the filter after this binder processing. Finally, the excess impregnated activated carbon was shaken off to obtain a filter to which the ozone decomposing gas adsorbent was attached.

With respect to the obtained filter sample, the ozone decomposing performance was evaluated 5 minutes after the initial stage in the same manner as in Example 10, and the acetaldehyde deodorizing effect was confirmed, and the results are shown in Table 3.

Comparative Example 4 As a filter base material, a film-removed product of polyether urethane foam manufactured by Bridgestone Corporation (trade name: Everlite SF QW-12 7t) was used, which was 7 mm × 25
It is cut into 0 mm x 250 mm, and the reactive urethane hot melt manufactured by Nippon NSC Ltd.
Bond Master MR70) was applied so that the coating amount would be 45 g / L.

Thereafter, petroleum pitch-based beaded activated carbon (trade name BAC-SP type) manufactured by Kureha Chemical Industry Co., Ltd. was fed from the front and back surfaces of the filter subjected to the present binder treatment to uniformly attach the activated carbon, Finally, the excess activated carbon was shaken off to obtain an unimpregnated activated carbon-adhered filter.

Example 1 for this filter sample
The ozone removal performance after the initial 5 minutes was evaluated by the same method as in 0, the acetaldehyde deodorization performance effect was confirmed, and the UL-94 combustion test was performed. The results are shown in Table 3.

Example 14 160 g of NH ₄ Br as an inorganic flame retardant was added to 2000 g of a 1 mol / L KCl aqueous solution and sufficiently dissolved, and then activated carbon adhered in the same manner as in Comparative Example 4 in this mixed solution. Activated carbon filter (size 7mm x 250mm
(× 250 mm) was soaked for 30 minutes, and then this sample was dehydrated and completely dried in an atmosphere of 110 ° C. to obtain a sample of Example 14.

With respect to this sample, the ozone removal performance after the initial 5 minutes was evaluated and the UL-94 combustion test was conducted in the same manner as in Example 10, and the results are shown in Table 3.

[0116]

[Table 3]

[0117]

As described in detail above, according to the present invention, an ozone decomposing type gas adsorbent and a filter material which are excellent in ozone gas decomposing performance and gas adsorbing performance and which can be repeatedly used by regeneration are provided. The ozone decomposing gas adsorbent or the filter material can be regenerated with high regeneration efficiency and repeatedly used.

INDUSTRIAL APPLICABILITY The present invention is effective in a wide range of fields such as a copying machine, a printer, an air purifier of an electrostatic precipitator, and a filter material for a super clean room used in the semiconductor industry. It is expected to be used in various ways in terms of recycling, reuse, and reduction by recycling the agent and filter material.

[Brief description of drawings]

FIG. 1 is a system diagram showing a schematic configuration of an ozone decomposing performance measuring apparatus used in Examples and Comparative Examples.

FIG. 2 is a system diagram showing a schematic configuration of an acetaldehyde deodorizing performance measuring apparatus used in Examples and Comparative Examples.

[Explanation of symbols]

1 Ozone generator 2 samples 3 sample containers 4 columns 5 Ozone concentration measuring instrument 6 Low-pressure mercury lamp 7 UV absorption cell 8 Photocurrent detector 9 CPU 11 columns 12 samples 13 Gas cleaning bottle 14 Air pump 15 Acetaldehyde solution 16,17 Three-way cock

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01J 20/34 B01D 53/34 ZAB F term (reference) 4D002 AA11 AC10 BA04 DA01 DA16 DA41 EA09 EA13 GA01 GB08 GB12 GB20 4D012 BA01 4D019 AA01 BA02 BA05 BA12 BA13 BB02 BB03 BB07 BC05 BC07 BC11 BC20 CA01 CA02 CB06 DA02 4G066 AA04B AA05B AA13D AA33D AA35D AA43D AB07D AB09D AB15D BA20 BA26 DA03 FA11 FA14 FA37 GA

Claims (29)

[Claims] 1. One or more alkali metal compounds selected from the group consisting of alkali metal salts and alkali metal hydroxides are attached to the surface and / or the inside of a porous adsorbent containing carbon atoms. Ozone decomposition type gas adsorbent. 2. The method according to claim 1, wherein the alkali metal compound is LiCl, NaCl, KCl, LiOH, NaO.
H, KOH, Li ₂ CO ₃ , Na ₂ CO ₃ , and K ₂ C
An ozone decomposing gas adsorbent, which is one or more selected from the group consisting of O ₃ . 3. The porous adsorbent material according to claim 1, wherein the porous adsorbent is selected from the group consisting of petroleum pitch-based activated carbon, coconut palm activated carbon, activated carbon fiber, coal-based activated carbon, wood-based activated carbon, old tire rejuvenated activated carbon and bone charcoal. 1 or 2 or more types, the shape of which is crushed, powder, pellet, spherical,
An ozone decomposing gas adsorbent, which is one kind or two or more kinds selected from the group consisting of an elliptic sphere and a fibrous shape. 4. The average particle size according to claim 1, wherein the porous adsorbent has an average particle size of 5 to 5000 μm.
An ozone decomposing gas adsorbent characterized by being 5. The ozone decomposing type according to claim 1, wherein the amount of the alkali metal impregnated is 0.1 to 30% by weight with respect to the porous adsorbent. Gas adsorbent. 6. The adsorption specific surface area according to claim 1, wherein the porous adsorbent has an adsorption specific surface area of 500 g / m ^2.
An ozone decomposing gas adsorbent characterized by the above. 7. The JIS K1 according to claim 1, wherein the porous adsorbent is 80% by weight or more.
An ozone decomposing gas adsorbent having a hardness of 474-4.7. 8. The method according to claim 1, wherein the porous adsorbent is immersed in an aqueous solution of the alkali metal compound, or the porous adsorbent is sprayed with the aqueous solution of the alkali metal. Thus, an ozone decomposing type gas adsorbent characterized in that an alkali metal compound is attached to the porous adsorbent. 9. The method according to claim 8, wherein the aqueous solution of the alkali metal compound contains one or more binder components selected from the group consisting of latex, hot melt powder, and water dispersion emulsion. Ozone decomposing type gas adsorbent. 10. The aqueous solution of the alkali metal compound according to claim 8 or 9, containing one or more selected from the group consisting of aminophenylacetic acid, 2-aminoethane-1-sulfonic acid and malic acid. An ozone decomposing gas adsorbent characterized by. 11. The ozone decomposing gas adsorbent according to claim 8, wherein the aqueous solution of the alkali metal compound contains an inorganic flame retardant. 12. The ozone decomposing gas adsorption according to claim 8, wherein the concentration of the alkali metal compound in the aqueous solution of the alkali metal compound is 0.1 to 10 mol / L. Agent. 13. A filter material comprising the ozone decomposing gas adsorbent according to claim 1 carried on the surface and / or inside of a filter substrate. 14. The filter substrate according to claim 13, wherein the filter substrate is a foam such as polyurethane foam, polyolefin foam, ceramic foam or metal foam, a processed product of the foam, polyamide or polyethylene,
A filter material comprising one or more selected from the group consisting of organic fibers such as polypropylene, polyester and polytetrafluoroethylene, glass fibers, ceramic fibers and paper. 15. The filter base material according to claim 13 or 14, wherein the filter base material has a three-dimensional net-like skeleton structure, a net shape, a pleat shape formed into a pleated shape, and a corrugated sheet. Laminated and cross-section cut, honeycomb structure, net-like one having a three-dimensional structure in which fibers are knitted in a three-dimensional manner, net-like one in which a plurality of fibers are bundled and twisted to be woven geometrically. A single structure or a composite structure of two or more kinds selected from the group consisting of ones, a net-shaped one that has been subjected to both longitudinal and transverse biaxial stretching, and a non-woven one that is made by a melt blown or spunbond method. A filter material characterized by being present. 16. The filter material according to claim 13, wherein the ozone decomposing gas adsorbent is adhered to the filter base material by a binder component. 17. The method according to claim 16, wherein a binder component is attached to the surface and / or the inner skeleton of the filter substrate, and the ozone decomposing gas adsorbent is then attached to the substrate through the binder component. A filter material characterized by being attached. 18. The filter according to claim 13, wherein the porous adsorbing substance is attached to the filter substrate by a binder component, and then the alkali metal compound is attached. Material. 19. The ozone decomposing gas according to claim 16, wherein the filter substrate is impregnated in a liquid containing the ozone decomposing gas adsorbent and a binder component and then dried. A filter material characterized by having an adsorbent attached. 20. The ozone-decomposing type substrate according to claim 16, wherein the filter base material is impregnated in a liquid containing the alkali metal compound, a porous adsorbing substance and a binder component and then dried. A filter material having a gas adsorbent attached thereto. 21. The binder component according to claim 16, wherein the binder component is a moisture-reactive urethane-based prepolymer, a synthetic rubber-based adhesive, a modified silicone-based prepolymer, or a hot melt-type or urethane-based thereof. One or more selected from the group consisting of emulsions, epoxy binders, vinyl acetate binders, acrylic binders, polyolefin binders, SBR binders, NBR binders, and chloroprene binders. Filter material. 22. The filter material according to any one of claims 13 to 21, further comprising an inorganic flame retardant attached thereto. 23. The ozone decomposing gas adsorbent according to any one of claims 1 to 12 or claim 13 or 2.
A method for regenerating the filter material according to any one of 2, wherein the ozone decomposing gas adsorbent or the filter material is one selected from the group consisting of alkali metal salts and alkali metal hydroxides. Alternatively, a method for regenerating an ozone-decomposing gas adsorbent or a filter material, which comprises impregnating two or more kinds of alkali metal compounds. 24. The ozone decomposing gas adsorbent or filter material according to claim 23, wherein the ozone decomposing gas adsorbent or filter material is washed with an alkaline cleaning liquid, and then the alkali metal compound is attached. How to play. 25. The alkaline substance contained in the alkaline cleaning solution according to claim 24, wherein the alkaline substance is LiCl or NaC.
1, KCl, LiOH, NaOH, KOH, Li ₂ CO
_A method for regenerating an ozone-decomposing gas adsorbent or a filter material, which is one or more selected from the group consisting of ₃ , Na ₂ CO ₃ , and K ₂ CO ₃ . 26. The concentration of an alkaline substance contained in the alkaline cleaning liquid according to claim 24 or 25.
The method for regenerating an ozone decomposing gas adsorbent or a filter material is characterized in that it is 001 to 1.0 mol / L. 27. The ozone decomposing gas according to any one of claims 24 to 26, wherein the ozone decomposing gas adsorbent or the filter material is washed by vibrating an alkaline cleaning liquid with ultrasonic waves. Regeneration method of adsorbent or filter material. 28. A regenerated product of an ozone decomposing gas adsorbent regenerated by the method according to any one of claims 23 to 27. 29. A reclaimed filter material reclaimed by the method according to any one of claims 23 to 27.